Dashboard - redesign admin UI

[AmaLuci]

Goal
Redesign the dashboard to provide a clear and informative overview of the PBX, improving visibility of system status and key information.

This section includes:

• System overview (general PBX status)
• Key metrics (e.g. users, devices, trunks)
• System status indicators (e.g. trunks, devices availability)
• Warnings and highlights (e.g. missing configuration, issues)
• Entry points to relevant sections (via links, not direct actions)

Design goals

• provide a clear and immediate understanding of system status
• highlight relevant information and potential issues
• improve information hierarchy and readability
• keep the dashboard informative, not action-driven
• avoid redundancy with other sections

Output
hi-fi mockups
layout and prioritization of information
states (empty, warning, error) and edge cases